Simply use this code:

<a href="https://na.finalfantasyxiv.com/lodestone/playguide/db/item/b2cab67854f/" class="eorzeadb_link">Dreadwyrm Blade</a>
Which will look like this:  (mouseover it)
Dreadwyrm Blade

You can view tooltip codes when browsing entries on the Eorzea Database by clicking Display Fan Kit Tooltip Code.